I'm taking on a side job this weekend in an attempt to clean-up after a very bad installation and give the people a decent 2nd floor system in their home. Presently utilizing a straight air system with a hydronic coil for heat. I want to keep the hydronics but am considering switching to a heat pump. The down-side is that this larger home is completely finished and pulling new stat wire would be a nightmare. Has anyone worked with the wireless Honeywell thermostats? Do they work? Do they last? Any issues that I should be aware of?